5W46:
reference: Impact of different ionization states of phosphorylated Serine-65 on ubiquitin structure and interactions., Kazansky Y, Lai MY, Singh RK, Fushman D, Sci Rep. 2018 Feb 8;8(1):2651. doi: 10.1038/s41598-018-20860-w. PMID: 29422536

This OCA Structure page
uses Jmol, developed by the Jmol Development Team (documentation).